let pwd = document.querySelector(".pwd");
let bac = document.querySelector(".bac");
let blurX = 8;
pwd.addEventListener("input", () => {
  let len = pwd.value.length;
  blurX = 8 - len >= 0 ? 8 - len : 0;
  bac.style.filter = `blur(${blurX}px)`;
});
